Abstract
The effect of anode composition on the electrochemical performance of cathode-supported micro solid oxide fuel cells (SOFCs) was evaluated using current-voltage and AC impedance measurements. The micro SOFCs were fabricated by the extrusion of a microtubular (La0.8Sr0.2)0.97MnO3 support and subsequent surface coating with a Ce0.9Gd0.1O1.95 (GDC)/Sc2O3-doped ZrO2 bilayer electrolyte and NiO-GDC anode layers. Impedance analysis indicated that 50wt%NiO-50wt%GDC anode has higher electrode activity than 70wt%NiO-30wt%GDC anode. The SOFC with 50wt%NiO generated approximately eight times higher power density than that with 70wt%NiO.
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